Ammunition



March 4 1924.

H. P. MARTIN ET AL AMMUNITION Filed Sept. :5; 1920 pin (Z which passesthrw i atented Mar. 4, 1924,

HELMUTH PAUL MAR-TIN AND OWEN DAVID LUCAS, 0

VfESTIi IINSTER, ENGLAND,

ASSIGNORS TO le'I. L. EXPERIMENTAL LIMITED, BF HEETMINSTEB, ENGLAND.

AMMUNITION.

Application filed September 3, 1920.

Serial No. 408,056.

(GRANTED UNDER THE PROVISIONS OF THE ACT 93? MARCH 3, 19.21, 41 STAT. L,1313.)

To all whom it may concern.

Be it known that we, I-Inmrcrrr PAUL MARTIN and OWEN DAVID Lucas, bothsuh jects of the King of Great Britain, resi g at Vickers House,Broadway, lVcsiininster, in the county oi London. England, have inventedcertain new and useful Improvements in Amn'iunition (for which we havefiled application for patent in Great Britain March 27th, 1916, PatentNo. 124,782}, of which the following is a specification.

This invention relates to electrically fired ammunition and has for itsobject to pro vide an improved form of primer or detonator for thispurpose.

In the accompanying drawings The figure is a longitudinal section of acartridge according to our invention.

In the said figure is a cartridge ordinary construction as regards thebody portion, provided with the anvil Z). The ordinary percussion cap isin the improvet construction replaced by an insulating plug 0 whichserves to insulate a central contact ugh the plug and may be secured byrivetin over the ends as shewn or in other suitable manner. The plug 0is made hollow at v to contain the 'lulminate of mercury j which is thussituated between the contact (Z and the an il 5.

The construction of the improved primer or detonator cap is such that incase of need it can be fired in the manner of an ordinary primer bypercussion; when operated in this way the hammer strikes the pin d anddrives it and the cap 6 against the anvil b and thereby detonates andtires the cartridge.

In the figure we have shown our improved primer or detonator caparranged for firing by the hot wire method. It will be understood thatthe contact pin (4 serves as one terminal for connection to a suitable sof electricity While the body of the cartridgi-r and the anvil Z2 serveas the other termini-Ll.

The wire it which becomes highly heated by reason of the passage of anelectric or rent when it is desired to explode the rtridge, is jammed byor otherwise secured between the pin d and the side of its hole, theWirepassing through the fulininate oi mercury j and being clampedbetween the insulating plug 0 and the body of the curtridge with the hotwire arrangement an ordinary low tension circuit is employed which iscompleted as before through the pin (Z, the hot wire it and the body ofthe cartridge in a suitable manner.

What we claim and desire to secure by Letters Patent of the UnitedStates is:-

In an electrically fired cartridge, the combination of an anvil, aninsulating plug in the rear part of the cartridge, an electric contactcarried by said plug in alignment In testimony whereof we affix ournatures.

sig-

HELMUTH PAUL MAR-TIT. OWEN DAVID LUCAS.

